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Abstract
One of the main problems facing the cultivation of vanilla (Vanilla planifolia Jacks. ex Andrews) in Mexico and the world is its susceptibility to pests and diseases, among which stands out the root and stem rot caused by Fusarium oxysporum f. sp. vanillae. Although Mexico is the center of origin and domestication of vanilla, there are currently no genetic materials resistant to this pathogen. For this reason the Institute of Biotechnology and Applied Ecology (INBIOTECA) of the University Veracruzana has undertaken for years a biotechnological genetic improvement program in order to obtain vanilla genotypes resistant to this pathogen. To this end, plants (regenerated from callus) with high percentages of polymorphism obtained in previous studies, were submitted to concentrations of 50% (v/v) of Fusarium oxysporum f. sp. vanillae. To date, 27.7% of plants resistant to this concentration of fungal filtration have been obtained, which will be evaluated under field conditions.